Gadolinium Gallium Garnet (GGG)
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5
Specific Gravity
7.05
Refractive Index
1.97 – 2.03
Crystal System
Isometric
Color
red
Mohs Hardness
| Mohs | Reference mineral | Gadolinium Gallium Garnet (GGG) |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Price Tier
Moderate ($50-500/ct)
Where to Buy Gadolinium Gallium Garnet (GGG)
Blue Nile
Fine jewelry retailer
James Allen
Gemstone jewelry
Brilliant Earth
Ethically sourced gems
Amazon
Wide selection
Links may earn a commission at no extra cost to you.
About Gadolinium Gallium Garnet (GGG)
ガドリニウムガリウムガーネット（GGG）は、ガドリニウムとガリウムからなる合成宝石（Gd₃Ga₅O₁₂）で、ダイヤモンド代替品として1970年代に使用されました。高い屈折率と分散性を持ちますが、後にキュービックジルコニアに市場を明け渡しました。現在は主に磁気バブルメモリなど電子部品に使用されています。
On this page
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Gadolinium Gallium Garnet (GGG)?
ガドリニウムガリウムガーネット（GGG）は、ガドリニウムとガリウムからなる合成宝石（Gd₃Ga₅O₁₂）で、ダイヤモンド代替品として1970年代に使用されました。高い屈折率と分散性を持ちますが、後にキュービックジルコニアに市場を明け渡しました。現在は主に磁気バブルメモリなど電子部品に使用されています。
What is the hardness of Gadolinium Gallium Garnet (GGG)?
Gadolinium Gallium Garnet (GGG) has a Mohs hardness of 6.5, making it moderate for use in jewelry.
What color is Gadolinium Gallium Garnet (GGG)?
Gadolinium Gallium Garnet (GGG) is primarily Red.
How much does Gadolinium Gallium Garnet (GGG) cost?
Gadolinium Gallium Garnet (GGG) falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Gadolinium Gallium Garnet (GGG)?
Gadolinium Gallium Garnet (GGG) belongs to the Isometric crystal system.